Yes it is.
For the end user, if one platform has driver support and the other one doesn't, then one platform works and the other one does not.
"It's not my bug" is a thing engineers get to say to close issues on their backlog, but it doesn't magically fix the problem for the end user if the other side says the same thing (or doesn't care).
If you want people to use Linux, then Linux has to work, and that includes the third party drivers.